simplewallet: check file overwrite when exporting stuff

src/simplewallet/simplewallet.cpp

@@ -442,6 +442,21 @@ namespace
       fail_msg_writer() << tr("unexpected error: ") << e.what();
     }
   }
+
+  bool check_file_overwrite(const std::string &filename)
+  {
+    boost::system::error_code errcode;
+    if (boost::filesystem::exists(filename, errcode))
+    {
+      if (boost::ends_with(filename, ".keys"))
+      {
+        fail_msg_writer() << boost::format(tr("File %s likely stores wallet private keys! Use a different file name.")) % filename;
+        return false;
+      }
+      return command_line::is_yes(input_line((boost::format(tr("File %s already exists. Are you sure to overwrite it? (Y/Yes/N/No): ")) % filename).str()));
+    }
+    return true;
+  }
 }
 
 bool parse_priority(const std::string& arg, uint32_t& priority)
@@ -874,6 +889,8 @@ bool simple_wallet::export_multisig(const std::vector<std::string> &args)
     return true;
 
   const std::string filename = args[0];
+  if (m_wallet->confirm_export_overwrite() && !check_file_overwrite(filename))
+    return true;
   try
   {
     cryptonote::blobdata ciphertext = m_wallet->export_multisig();
@@ -1122,6 +1139,8 @@ bool simple_wallet::export_raw_multisig(const std::vector<std::string> &args)
   if (m_wallet->ask_password() && !get_and_verify_password()) { return true; }
 
   std::string filename = args[0];
+  if (m_wallet->confirm_export_overwrite() && !check_file_overwrite(filename))
+    return true;
   try
   {
     tools::wallet2::multisig_tx_set txs;
@@ -1470,6 +1489,19 @@ bool simple_wallet::set_confirm_backlog_threshold(const std::vector<std::string>
   return true;
 }
 
+bool simple_wallet::set_confirm_export_overwrite(const std::vector<std::string> &args/* = std::vector<std::string>()*/)
+{
+  const auto pwd_container = get_and_verify_password();
+  if (pwd_container)
+  {
+    parse_bool_and_use(args[1], [&](bool r) {
+      m_wallet->confirm_export_overwrite(r);
+      m_wallet->rewrite(m_wallet_file, pwd_container->password());
+    });
+  }
+  return true;
+}
+
 bool simple_wallet::set_refresh_from_block_height(const std::vector<std::string> &args/* = std::vector<std::string>()*/)
 {
   const auto pwd_container = get_and_verify_password();
@@ -1824,6 +1856,7 @@ bool simple_wallet::set_variable(const std::vector<std::string> &args)
     success_msg_writer() << "merge-destinations = " << m_wallet->merge_destinations();
     success_msg_writer() << "confirm-backlog = " << m_wallet->confirm_backlog();
     success_msg_writer() << "confirm-backlog-threshold = " << m_wallet->get_confirm_backlog_threshold();
+    success_msg_writer() << "confirm-export-overwrite = " << m_wallet->confirm_export_overwrite();
     success_msg_writer() << "refresh-from-block-height = " << m_wallet->get_refresh_from_block_height();
     return true;
   }
@@ -1872,6 +1905,7 @@ bool simple_wallet::set_variable(const std::vector<std::string> &args)
     CHECK_SIMPLE_VARIABLE("merge-destinations", set_merge_destinations, tr("0 or 1"));
     CHECK_SIMPLE_VARIABLE("confirm-backlog", set_confirm_backlog, tr("0 or 1"));
     CHECK_SIMPLE_VARIABLE("confirm-backlog-threshold", set_confirm_backlog_threshold, tr("unsigned integer"));
+    CHECK_SIMPLE_VARIABLE("confirm-export-overwrite", set_confirm_export_overwrite, tr("0 or 1"));
     CHECK_SIMPLE_VARIABLE("refresh-from-block-height", set_refresh_from_block_height, tr("block height"));
   }
   fail_msg_writer() << tr("set: unrecognized argument(s)");
@@ -6329,6 +6363,8 @@ bool simple_wallet::export_key_images(const std::vector<std::string> &args)
   }
   if (m_wallet->ask_password() && !get_and_verify_password()) { return true; }
   std::string filename = args[0];
+  if (m_wallet->confirm_export_overwrite() && !check_file_overwrite(filename))
+    return true;
 
   try
   {
@@ -6396,6 +6432,8 @@ bool simple_wallet::export_outputs(const std::vector<std::string> &args)
   }
   if (m_wallet->ask_password() && !get_and_verify_password()) { return true; }
   std::string filename = args[0];
+  if (m_wallet->confirm_export_overwrite() && !check_file_overwrite(filename))
+    return true;
 
   LOCK_IDLE_SCOPE();
   try

src/simplewallet/simplewallet.h

@@ -128,6 +128,7 @@ namespace cryptonote
     bool set_merge_destinations(const std::vector<std::string> &args = std::vector<std::string>());
     bool set_confirm_backlog(const std::vector<std::string> &args = std::vector<std::string>());
     bool set_confirm_backlog_threshold(const std::vector<std::string> &args = std::vector<std::string>());
+    bool set_confirm_export_overwrite(const std::vector<std::string> &args = std::vector<std::string>());
     bool set_refresh_from_block_height(const std::vector<std::string> &args = std::vector<std::string>());
     bool help(const std::vector<std::string> &args = std::vector<std::string>());
     bool start_mining(const std::vector<std::string> &args);

src/wallet/wallet2.cpp

@@ -611,6 +611,7 @@ wallet2::wallet2(bool testnet, bool restricted):
   m_merge_destinations(false),
   m_confirm_backlog(true),
   m_confirm_backlog_threshold(0),
+  m_confirm_export_overwrite(true),
   m_is_initialized(false),
   m_restricted(restricted),
   is_old_file_format(false),
@@ -2441,6 +2442,9 @@ bool wallet2::store_keys(const std::string& keys_file_name, const epee::wipeable
   value2.SetUint(m_confirm_backlog_threshold);
   json.AddMember("confirm_backlog_threshold", value2, json.GetAllocator());
 
+  value2.SetInt(m_confirm_export_overwrite ? 1 :0);
+  json.AddMember("confirm_export_overwrite", value2, json.GetAllocator());
+
   value2.SetInt(m_testnet ? 1 :0);
   json.AddMember("testnet", value2, json.GetAllocator());
 
@@ -2522,6 +2526,7 @@ bool wallet2::load_keys(const std::string& keys_file_name, const epee::wipeable_
     m_merge_destinations = false;
     m_confirm_backlog = true;
     m_confirm_backlog_threshold = 0;
+    m_confirm_export_overwrite = true;
   }
   else if(json.IsObject())
   {
@@ -2621,6 +2626,8 @@ bool wallet2::load_keys(const std::string& keys_file_name, const epee::wipeable_
     m_confirm_backlog = field_confirm_backlog;
     GET_FIELD_FROM_JSON_RETURN_ON_ERROR(json, confirm_backlog_threshold, uint32_t, Uint, false, 0);
     m_confirm_backlog_threshold = field_confirm_backlog_threshold;
+    GET_FIELD_FROM_JSON_RETURN_ON_ERROR(json, confirm_export_overwrite, int, Int, false, true);
+    m_confirm_export_overwrite = field_confirm_export_overwrite;
     GET_FIELD_FROM_JSON_RETURN_ON_ERROR(json, testnet, int, Int, false, m_testnet);
     // Wallet is being opened with testnet flag, but is saved as a mainnet wallet
     THROW_WALLET_EXCEPTION_IF(m_testnet && !field_testnet, error::wallet_internal_error, "Mainnet wallet can not be opened as testnet wallet");

src/wallet/wallet2.h

@@ -837,6 +837,8 @@ namespace tools
     void confirm_backlog(bool always) { m_confirm_backlog = always; }
     void set_confirm_backlog_threshold(uint32_t threshold) { m_confirm_backlog_threshold = threshold; };
     uint32_t get_confirm_backlog_threshold() const { return m_confirm_backlog_threshold; };
+    bool confirm_export_overwrite() const { return m_confirm_export_overwrite; }
+    void confirm_export_overwrite(bool always) { m_confirm_export_overwrite = always; }
 
     bool get_tx_key(const crypto::hash &txid, crypto::secret_key &tx_key, std::vector<crypto::secret_key> &additional_tx_keys) const;
     void check_tx_key(const crypto::hash &txid, const crypto::secret_key &tx_key, const std::vector<crypto::secret_key> &additional_tx_keys, const cryptonote::account_public_address &address, uint64_t &received, bool &in_pool, uint64_t &confirmations);
@@ -1119,6 +1121,7 @@ namespace tools
     bool m_merge_destinations;
     bool m_confirm_backlog;
     uint32_t m_confirm_backlog_threshold;
+    bool m_confirm_export_overwrite;
     bool m_is_initialized;
     NodeRPCProxy m_node_rpc_proxy;
     std::unordered_set<crypto::hash> m_scanned_pool_txs[2];